Door-lock.



J. LAGOSZ.

DOOR LOCK.

APPLICATION FILED SEPT 16. ms.

1 ,288, 6 l 8. Patented Dec. 24, 1918.

//V I/E IV TOR i07 Zaym'z.

By W 4 0 ink/1 Tram/Er y ra ts :le 1 a. a

DOOR-LOCK. I

Essex, and State of New York, have invented certain new and useful Improvements in Door-Locks, of which the following is a specification.

This invention relates to improvements in devices for securing doors in a closed position, and has as its special object the provision of means whereby in addition to the usual securing means others of a secret nature are employed.

This and other like objects are attained by the novel construction and combination of parts hereinafter described and shown in the accompanying drawings, forming a material part of this disclosure and in which- Figure 1 is a perspective view showing a conventional type of door as applied within a jamb set in the wall of a building.

Fig. 2 is an enlarged fragmentary transverse sectional view taken on line 22 of Fig. 4.

Fig. 3 is a fragmentary front elevational view,'showing the inner side of the door and the secret locking device attached thereto.

Fig. 4 is a side elevational and sectional view of the device drawn to an enlarged scale.

Fig. 5 is a perspective view of the keeper, and

Fig. 6 is a perspective view of the independently operable means by which the secret lock is operated.

Referring to the drawings, the numeral 10, indicates a conventional type of wall, provided with jambs 11, in which is fitted a hinged dOOr 12, containing the ordinary flat bolt 15, having a beveled portion 16 adapted to make contact with the edge of the jamb. and be retracted, compressing the coiled com pression spring 17, set in a recess 18 formed in the door, the recess being enlarged at its rear end, receptive of a lug 19, formed with the bolt 15. whereby it is prevented from moving outwardly beyond a predetermined distance, but permitted to move inwardly so that the beveled portion 16 may be retracted level with the edge of the door.

Formed in the lower side of the bolt 15, is a rack 20 engageable with which is a segmental gear 22, formed with the spindle 23, which extends outwardly and has secured upon it an ordinary operating knob 24, the

Specification of Letters Patent. Patented Dec, 24:, 1918. Application filed September 16, 1918. Serial No. 254,213. I i

same being secured byzthe sleeve 25,'held in position by'the flush headed cap screw 26." I

The inner end of the spindle 23, has, ,a shoulder 28, abutting against the solid portion of the door 12, within the recess in which 1t operates, and extending centrally therefrom is a stem 29, having a screw 30 at its end, engaged in position by a nut 32, the arrangement being such that the spindle 23, is freely rotatable but prevented from longitudinal movement in either direction.

Thus when the knob 24 is rotated, the rack will be actuated and the bolt 15 retracted against the spring 17. Loosely mounted upon the inner portion of the spindle 23, is a sleeve 33, having an extending end or finger 34, movable through an arcuate slot 35, formed concentric with the spindle 23, the

finger extending outwardly from the inner side of the door, and engaged in an opening 36 formed therein, is a flexible element 37, engaged in an appropriately formed perforation in the shorter vertical arm 38, of a bellcrank lever, pivoted on the pin 39, the longer arm 40, being placed so as to extend past the edge of the door 12 and engage within a recess 42, formed between the fixed portion 43, and the arm 44 of a detent secured to the inner side of the jamb of the door, so as to prevent the lever 40, from moving outwardly from the detent except it be raised.

In operation, the knob 24, is turned in the ordinary manner, and the bolt 15 is retracted, but the lever arm 40, still remains in engagement with the keeper, until the sleeve 33 be rotated on the spindle, which is accomplished by grasping the same by the fingers and turning it independently of any action of the spindle 23, and it will be obvious that upon turning the sleeve the finger will be moved toward the rear of the slot 35, and, through the bell-crank lever, raise the element 40, from engagement with the keeper permitting the door to be opened.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a door locking device, the combination with a sliding bolt, a spindle adapted to actuate said bolt, and an operating knob on the extending end of said spindle, of a sleeve journaled on said spindle, an arm extending opposite to said knob formed with said sleeve. said arm being operable through a slot in the door, a bell-crank lever mounted (lop ies of this" patent may obtained for contiguous to 'the xedge of door; a "keeper? fixed upon the jamb thereof in which one of the arms of the bell-crank lever is engageable, and operative connectons; between the other arm of said bell-crank lever and the arm projecting from said sleeve.

2. In a secret door locking device, the combination with a spindle rotatablymounted in a door and means for actuating said spindle, of a sleeve rotatable on said spindle, an arcuate sl0t formed. through said door radialvvith said s pindlaali, arm formed with five cents eaeh pby addressing Washington, LG,

saidsleeve operable in'said areua-te slot, a keeper rigidly engaged upon the jamb of said door, a bell-crank lever pivoted near the edgeof said door having one of its arms engageable Within said keeper, and flexible conneotions extending between the other arm of said bell-crank lever, and the arm formed with said sleeve.

In testimony whereof I have affixed my signature.

JOSEF LA oS'z.

the Gommissioner of Patentis 

